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Note 9 - Note Receivable (Details) - Details of Closing Transaction (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 12 Months Ended
Apr. 30, 2014
Dec. 31, 2014
Proceeds    
Cash received $ 686us-gaap_ProceedsFromCollectionOfNotesReceivable $ 686us-gaap_ProceedsFromCollectionOfNotesReceivable
1-4 family mortgage note (fair value)   560us-gaap_TransferMortgagePayable
Net proceeds received   1,246us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1
Assets derecognized    
Note due from the mortgage company   2,753boch_DerecognizedAssetsNoteDueFromTheMortgageCompany
Warehouse line of credit   259boch_DerecognizedAssetsWarehouseLineOfCredit
Discount on the note   (374)boch_NoteReceivableFairValueAdjustment
Total assets derecognized   2,638boch_TotalAssetsDerecognized
Loss on settlement of the note $ 1,400boch_LossOnSettlementOfNoteReceivable $ 1,392boch_LossOnSettlementOfNoteReceivable